Concrete-spreader.



PATENZED AUG. 18, 1908.

J. E; BRIGGS.

CONCRETE SPREADER.

APPLICATION FILED sEPT. 26, 1906. RENEWED JULY 20, 1908.

Q and in' dotted lines "the UNITED STATES PATENT OFFICE.

JAMES E.'BRIG GS-, oF WATERLOO, IOWA, ASSIGNOR TO BRIGGS LABOR SAVlNG SPECIALTY COMPANY, or WATERLOO, IOWA.

' concnnrn-srnnannn.

specification of Letters Patent.

Patented Aug. 18, 1908.

Application flledfleptenzber 26, 1906, Serial N.;333,365. Renewed July 20, 1908.. Serial No. 444,366.

To all whom it may concern." y

Be; it known that I, JAMES E. Bntoes, a citizen of the United States of America, and a resident of Waterloo, Blackhawk'county,

Iowa, have invented certain new and useful Improvements in Concrete-Spreaders, of which the following is a specification.

My invention relates to co'ncrete Spreaders, and among its objects are, to provide a bottom-dumping-box for conveying concrete or other material to be used in street paving, I and to provide such means for re ulatmg and adjusting the movable bottom o said box as will armit its depositing the contained load to an desired depth on the street. These object I have accom lished by the means which are hereinafter escribed and claimed,

and which are illustrated in the accompanying drawing forming a part of this specification, which showsm s1de elevation a fourwheeled spreaderembod 'ing theinventio'n,

umping position of the device. I Referring'to the'numerals on the drawing, 7 2523 indicates a containing box, that is suspended from a frame 22 mounted on wheels 24 in any usual or preferred manner. Said box may be of any roper size and shape, and is provided with a swing bottom 37, 3o hung so that the apparatus may discharge rearwardly, a hinge 38 thereon being swung fr om a transverse rod 39 mountedin hangers 40 attached to the sides of the box. In orderto permit of the control of the device 35 from tli'e drivers seat, the hand-lever 26 is fulcruiii'ed in the 11' per end of a forward --upright.25 oftbe ame and is rotatable a ong a semi-circle 41 provided with a sto 42 ;to"'arrest its movement backward. Ao-link 28 "has its forward lend pivoted to the lever'26 on a-stud' 27, and'its rearQeIId-piV- otedto the upper end of a lever 3.0 on a stud:

29. "The lower 'end of said "lever is ful crumedon a stud-gextendin from the side- 45" ofthe box 23, as-is also the' ower'end of a driver 34." 32 i'sa lever connecting the stud 33- ofthe'upper end of the lever 34,'and a st'ud-36 on the side of the swing-bottomv37. Ach'ain 31 connects the upper ends of the levers 30 and 32; and it will be observed that by the arrangement of parts shown, the levers 30 and 34 have the effect of a lell-' cragnk construction when the hand-lever 26 is drawn forward to close the door 36, but with the difference that the ends of the bell- .deposited, nothin cient amount of binding cement within its crank arms are movable towardfeach'other and away from each other to a-certain extent, the device operating as a bell-crankonly when the ends of the arms are separated to the farthest extent ermitted by the chain 31. Thus, when the ottom 37 movcs'over any obstruction, the slack of the chain 31 al-- lows the bottom to move up and avoidbreakage. 1 L In practice, my improved s reader is .;used in the following manner. en the load of freshly mixed concrete has been conveyed to the point ofde osit, the swing bottom 37 may be dro ped by simpI carryin the lever 26 up and ackward to t e dotte line position of the drawing. The resultisto allow the load on the sw ng bottom'to take up the slack in chain 31, and to 0 en downwardly. At the same time that the load is bein dum'ped the box is causedto move forwar until the load is entirely dumped. The moving forward of the box while the load is being discharged causes said load to be deposited in a layer of even thickness upon the ground the thickness of said layer being determined by the extent of opening of the bottom 37. Instead, therefore, of the load being deposited in an irre 'ular or pyramidal cap, the greater art 0 which must be displaced and Towere to a common level by hard manual labor, as will be the case with-a load dumped in-the usual manner, my im roved spreader will itself grade the materia being gore bein needed than tin trim up the e g of the ayers at their lines of juxta osition. The saving of labor is obvious. 'Fhis spreader, moreover effects the de ositing oft e concretefinamassxof more omogeneous character than usual; When the box has been filled with aload'of F fresh material, 'theali'ghter'portions thereof, or .thi l-l'cemej tljbinderjliesat the top over the lowers'tra'tum of mixed broken stone. -A box dumped in the usual 'manner from the top will precipitate its upper stratum of li 0o uid cem'entrmmediately u on the groiin the heavier broken stone fo lowi and the concrete layer thus deposited lac a sulfiinterstices. When my im roved. box is dumped, from the bottom, t eheavier stratum'jof'broken stone is first de osited in a smooth layer upon the cum ,whilethe upper stratum of liquic cement follows, is poured equally from the top on the 11-0 ally obnnect'ed to sai disehfirge-opening e hinged door adapted to close'the said openin e hand-lever 2fi pivote ho er, allever 30 pivoted on a stud 35 to sa-i iopp er, links 0011- nected between said'leveis' 2 6 end30, a lever 34 also on said stud 35,'-a 1ever 3'2'ooi ne'cted between the lever 34 and saidhinged door, and 'a chain. connecting'theupper er ds Of said levers 30 and 32."

2. A concrete spreeder; eornjorisirig ia;

- wheeled ho Aug 1906. i 1 v JAMES mmoos-f "Witriessesn sem s er, the arms pper providdd with a transversediseha'r e ,openingin its bottom, fapted tofclose said o'penin lever pivotally oopneoted to said link p votelljrconnected to said han lever pivoted on said hin e (1 door, and a bell- I crank lever pivoted on t e side of said hop 25* F of said bell crank havin .imited relative inovability ar d one .a-rm ing pivoted to said 1i lever on the door.

' Signed at W nk and the other to the W 90} 9W h s itl y ff NNEbf',

a, hinged 20 

